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Orthoclase With Schorl

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QRI836876

Orthoclase With Schorl

Description Tabs

Description
Locality: 
Campo nell'Elba, Livorno Province, Tuscany, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.4 × 6.1 × 3.5 cm
Largest Crystal: 
2.70cm
Weight: 
74.00gr
Description

Well-formed orthoclase individual cropping out of the fine granular porphyry rock matrix, associated to a couple of small schorl crystals of good lustre. 
The crystal is in good condition and with a textbook habitus, with negligible peripheral contacts. Elban feldspars of this quality are rather rare to get ahold of in good conditions nowadays.
Dated back to the 80s.

Mineral Data
What's on the rock

Orthoclase

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0
Streak: 
White

Schorl

Formula: 
Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Strunz: 
9.CK.05
Hardness: 
7.0

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